import random
def system(kind):
    """该函数为美食推荐系统，请输入[正餐/甜点小吃/奶茶饮料]"""
    dinner = ['金拱门','吉野家','海底捞','肯德基','陶陶居','西贝莜面村']
    snacks = ['翠华','烤冷面','炸鸡','艾薯','满记甜品','冰激凌']
    milktea = ['一点点','奈雪的茶','喜茶','蜜雪冰城','贡茶','coco']
    if kind == '正餐':
        result = dinner[random.randint(0,len(dinner)-1)]
    elif kind == '甜点小食':
        result = snacks[random.randint(0,len(dinner)-1)]
    elif kind == '奶茶饮料':
        result = snacks[random.randint(0,len(dinner)-1)]
    else:
        result = '您输入的类别有误，请重新输入！'
    return print(result)
        